The 7 Pin Trailer Plug

  • Small round (for older vehicles)
  • 7 pin flat (for late model vehicles)
7 Pin Trailer Plug Small round
7 Pin Trailer Plug Small Round - Diagram
7 Pin Trailer Plug Small Flat - Diagram
12 pin flat plug and socket diagram

12 pin trailer plugs enable all connections for the 7 pin plug to tow a caravan, plus the ability to wire accessories.

  1. Left-hand turn indicator
  2. Reversing Signal
  3. Earth return
  4. 4. Right-hand turn indicator
  5. Service Brakes
  6. Stop Lamps
  7. Rear Lamps, Clearance and Side Marker Lamps
  8. Battery Charger/Winch
  9. Auxiliaries/Battery Lead
  10. Earth Return
  11. Rear Fog Lamp
  12. Auxiliaries
12 Pin Plug and Socket Cable Entry Diagram

The 12 pin rectangle trailer plug consists of a row of 7 pins and a row of 5 larger pins.


The row of 7 pins transfers electrical power to run the towing vehicle’s lighting system and electrical braking power.

Anderson plug installation to run the vehicle lighting system

The larger pins are used for higher current most common to run power to a 12 volt fridge or to charge a battery system on a towing vehicle (caravan or camper trailer.)

Latest Trailer Plug Installations

Ultimate Hilux Fit-out: Ready for Work or Travel

Ultimate Hilux Fit-out: Ready for Work, Travel, and Everything in Between

March 5, 2025
This Hilux 4WD fit-out ticks all the boxes in terms of providing reliable power, clear communication on the road, safe towing, and the ability to handle extended trips with a caravan. We installed a dual battery system with Redarc BCDC charger and solar charging capability via Anderson plugs. Towing and radio accessories were added for worry-free extended travels.
Landcruiser Fit-out for Jayco Caravan Holidays

Landcruiser Fit-out for Jayco Caravan Holidays

February 28, 2025
For hassle-free extended camping trips or weekend getaways, check out this LandCruiser fit-out. A simple, clean, and effective power setup for towing a new Jayco caravan. It will help your caravan's systems stay powered on the road, your portable fridge keeps running while you drive, and everything connects with a simple plug-in (no messy wiring or multiple connections).
Dual System Upgrade with Solar Input for 300 Series LandCruiser

Dual System Upgrade with Solar Input for 300 Series LandCruiser

February 27, 2025
Here's a complete towing and power management setup we recently installed, designed for extended trips in your 300 Series LandCruiser, towing a caravan. This fit-out will guarantee reliable power for all your accessories, complete confidence when braking and towing, clear communication all the way, and the ability to camp off-grid for longer.
Ford Ranger Caravan Adventure Fit-out

Ford Ranger Caravan Adventure Fit-out

February 25, 2025
The goal of this Ford Ranger adventure fit-out was to secure constant, reliable battery power for both the vehicle, the towed caravan, and all the gadgets. To guarantee a safe and enjoyable trip, we installed a rear battery system for reliable auxiliary power, Anderson plugs for seamless caravan connection, and convenient rear canopy power sockets for all accessories. Staying in touch is crucial off-road, so we've installed a premium UHF two-way radio and a custom bonnet-mounted bracket antenna for optimal reception. A Safety Dave camera kit was fitted to ensure reliable power connections and easy access to power points in the canopy. Our professional installation always maintains your vehicle's original look.
Ready to Tow: RAM 2500 Complete Plug Install for Caravan

Ready to Tow: RAM 2500 Complete Plug Install for Caravan

February 25, 2025
RAM 2500 fitted with everything needed for hassle-free caravan towing - clean, professional, and ready for action. We've installed a straightforward but comprehensive towing power setup: a 12-pin trailer plug for full connectivity; a red Anderson plug for caravan electronics; grey Anderson plug for fridge power. With this system, all your caravan's systems stay powered, your fridge keeps running while you drive, and everything connects with a simple plug-in.
Weekend Ready: UHF and Power for Your 300 Series

Weekend Ready: UHF, LED and Power for Your 300 Series

February 25, 2025
This installation completed on this 300 Series Landcruiser combined practical communication and power solutions for touring and camping needs. We started with a GME XRS two-way radio installation, featuring an RJ45 pass-through socket. This setup allows you to remove the handpiece when you're not using it, keeping your cabin tidy and your equipment secure. When you need to communicate, simply plug the handset back in and you're ready to go.
One Plug, Dual Power for Towing: Anderson and 7-Pin Plugs

One Plug, Dual Power for Towing: Anderson and 7-Pin Install for Ford Everest

February 25, 2025
Tired of dealing with multiple plugs and messy wiring when hooking up your trailer? We've got a neat solution that changed the game for this Ford Everest owner - and it could work for you too! This all-in-one solution integrates a dual 7-pin trailer plug with an Anderson plug. The dual connection is designed to provide maximum power when used with your camper, boat trailer, caravan or anything requiring high levels of power. It also keeps the rear of your car looking tidy.
Anderson Plug and Rear-View Camera for Caravan

Anderson Plug and Rear-View Camera for a Caravan

June 10, 2021
Towing your caravan safely and efficiently with a reverse camera, an electric brake controller and trailer plugs
Trailer Plug Installation for Caravan Towing

Trailer Plug Installation for Caravan Towing

May 26, 2021
12 pin trailer plug & Anderson plug to provide power to the caravan from the 4WD vehicle
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